So many ear worms to choose from! I do love the Baljeetles, Little Brothers, Carl's Theme Song and Doctor Coconut, but if you're going to make me choose just one, it's going to have to be SIMP Squirrels In My Pants.

Of course, this is Nerdfighters, so my final answer is Squirrels In My Pants... In Your Pants.

"Do you prefer funny or good-sounding?"

I'd like to think the two aren't mutually exclusive :P but I have to say it's a three way tie between There's a Platypus Controlling Me, Brand New Best Friend, and the extended edition of the Perry the Platypus theme song